public function whenMemberJoinedFrancken(MemberJoinedFrancken $event)
 {
     $member = new MemberList($event->memberId(), $event->firstName(), $event->lastName());
     $this->members->save($member);
 }
 public function applyMemberJoinedFrancken(MemberJoinedFrancken $event)
 {
     $this->id = $event->memberId();
     $this->first_name = $event->firstName();
     $this->last_name = $event->lastName();
 }